Method and apparatus for determining power offset parameters

ABSTRACT

The present invention discloses a method and an apparatus for determining a power offset parameter. The method for determining the power offset parameter provided in the present invention comprises: obtaining data throughput rate and/or cell resource usage state of a terminal; determining a resource state of the terminal according to the data throughput rate and/or the cell resource usage state and a corresponding threshold; determining power offset parameter configuration corresponding to the resource state according to the determined resource state; and sending the power offset parameter configuration to the terminal, so that the terminal determines the power offset parameter according to the power offset parameter configuration.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of U.S. patent application Ser. No.14/289,324, filed on May 28, 2014, which is a continuation ofInternational Patent Application No. PCT/CN2011/083037, filed on Nov.28, 2011. All of the afore-mentioned patent applications are herebyincorporated by reference in their entireties.

FIELD OF THE INVENTION

Embodiments of the present invention relate to the field ofcommunications, and in particular, to a method and an apparatus fordetermining a power offset parameter.

BACKGROUND OF THE INVENTION

High-speed uplink packet access (HSUPA, High-speed Uplink Packet Access)technologies are introduced into a wideband code division multipleaccess (WCDMA, Wideband Code Division Multiple Access) system and maincharacteristics of an HSUPA system include: 1. employing 10 ms/2 msshort frames; 2. employing a hybrid automatic repeat request HARQ(Hybrid Automatic Repeat reQuest) in a physical layer; and 3.implementing fast scheduling on a UE at a NodeB.

In the current HSUPA system, uplink multi-path search and channelestimation functions are mainly implemented relying on a DPCCH(Dedicated Physical Control Channel, dedicated physical controlchannel).

Actually, a power level of an uplink DPCCH channel is mainly decided bysuch parameters as transmission block size, target retransmission times,a reference E-DCH transport format combination indicator (E-TFCI, E-DCHTransport Format Combination Indicator) and a reference power offset ofan enhanced-dedicated physical data channel (E-DPDCH, Enhanced-DedicatedPhysical Data Channel) relative to DPCCH, an HARQ PO (PO is short forpower offset) of each media access control-d (MAC-d, Media AccessControl-d) flow, and the like. Because HSUPA supports variable speeds,all transmission blocks may be scheduled by a scheduling algorithm. Incase of fixed target retransmission times, uplink DPCCH SIR levelscorresponding to each transmission block at the moment are requiredcloser to each other, in view of that speed of an outer loop powercontrol (OLPC, Outer Loop Power Control) algorithm on adjusting a signalto interference ratio (SIR, Signal to Interference Ratio) target valueis far slower than change of the transmission blocks. However, theuplink DPCCH SIR level of each transmission block is mainly determinedby such parameters as the target retransmission times, the referenceE-TFCI and the reference power offset of the E-DPDCH relative to theDPCCH, the HARQ PO for each MAC-d flow, and the like. In the case offixedly configured target retransmission times, the reference offset ofthe E-DPDCH relative to the DPCCH and the HARQ PO for each MAC-d floware also fixedly configured.

Based on the existing protocol architecture, the power level of theuplink DPCCH is relatively stable in the case that the reference E-TFCI,the reference power offset and the HARQ PO are fixedly configured; andthe power level of the uplink DPCCH cannot balance an uplink higherspeed data transmission state with an uplink low-speed data transmissionstate simultaneously in the case that the target retransmission timesare fixed. It should be noted that, except a WCDMA system, othercommunication systems such as a Long Term Evolution system may alsoencounter similar problems.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a method and an apparatusfor determining a power offset parameter, for dynamically determiningpower offset parameter configuration adaptive to a current network stateof a terminal.

The method for determining a power offset parameter provided in thepresent invention includes: obtaining a data throughput rate and/or cellresource usage state of a terminal; determining power offset parameterconfiguration according to the data throughput rate and/or the cellresource usage state, and a corresponding threshold; and sending thepower offset parameter configuration to the terminal, so that theterminal determines the power offset parameter according to the poweroffset parameter configuration.

Optionally, the obtaining cell resource usage state includes: obtaininguplink load or user count of at least one cell in serving cells of theterminal; and/or, obtaining uplink load or user count of at least onecell in active set cells of the terminal.

Optionally, the determining power offset parameter configurationaccording to the data throughput rate and/or the cell resource usagestate, and a corresponding threshold comprises: determining a resourcestate of the terminal according to the data throughput rate and/or thecell resource usage state, and a corresponding threshold; determiningthe power offset parameter configuration corresponding to the resourcestate according to the determined resource state.

Optionally, the determining a resource state of the terminal accordingto the data throughput rate and/or the cell resource usage state, and acorresponding threshold includes:

determining a throughput rate state of the terminal according to thedata throughput rate and a corresponding throughput threshold, where thethroughput rate state includes at least one of a first throughput ratestate and a second throughput rate state, where the first throughputrate state indicates that the data throughput rate is greater than orequal to a first throughput rate threshold, and the second throughputrate state indicates that the data throughput rate is smaller than orequal to a second throughput rate threshold; and the first throughputrate threshold is greater than or equal to the second throughput ratethreshold; and/or

determining a user count state or an uplink load state according to thecell resource usage state and the corresponding threshold, where theuser count state includes at least one of a first user count state and asecond user count state, where the first user count state indicates thatthe user count is greater than or equal to a first user count threshold,where the second user count state indicates that the user count issmaller than or equal to a second user count threshold, and the firstuser count threshold is greater than or equal to the second user countthreshold; the uplink load state includes at least one of a first uplinkload state and a second uplink load state, where the first uplink loadstate indicates that the uplink load is greater than or equal to a firstuplink load threshold, and the second uplink load state indicates thatthe uplink load is smaller than or equal to a second uplink loadthreshold; and the first uplink load threshold is greater than or equalto the second uplink load threshold.

Optionally, the determining power offset parameter configurationcorresponding to the resource state according to the determined resourcestate includes:

determining the power offset parameter configuration as low-speedparameter configuration if the data throughput rate of the terminal isin the first throughput rate state, where the low-speed parameterconfiguration is power parameter configuration with a data transmissionrate lower than a data transmission rate threshold, a search path whosenumber is greater than a search path threshold and channel estimationprecision greater than a channel estimation precision threshold; or,

determining the power offset parameter configuration as high-speedparameter configuration if the data throughput rate of the terminal isin the second throughput rate state, where the high-speed parameterconfiguration is power parameter configuration with a data transmissionrate higher than the data transmission rate threshold, a search pathwhose number is smaller than the search path threshold and channelestimation precision greater than the channel estimation precisionthreshold.

Optionally, the determining power offset parameter configurationcorresponding to the resource state according to the determined resourcestate further includes:

determining the power offset parameter configuration as low-speedparameter configuration if the cell resource of a serving cell or atleast one cell in active set cells of the terminal is in the first usercount state or the first uplink load state, where the low-speedparameter configuration is power parameter configuration with a datatransmission rate lower than the data transmission rate threshold, asearch path whose number is greater than the search path threshold andchannel estimation precision greater than the channel estimationprecision threshold; or,

determining the power offset parameter configuration as high-speedparameter configuration if the cell resource of the serving cell of theterminal is in the second user count state or the second uplink loadstate, where the high-speed parameter configuration is power parameterconfiguration with a data transmission rate higher than the datatransmission rate threshold, a search path whose number is smaller thanthe search path threshold and channel estimation precision greater thanthe channel estimation precision threshold.

Optionally, the determining power offset parameter configurationcorresponding to the resource state according to the determined resourcestate further includes:

determining the power offset parameter configuration as low-speedparameter configuration if the throughput rate of the terminal is in thesecond throughput rate state and the cell resource of a serving cell orat least one cell in active set cells of the terminal is in the firstuplink load state, where the low-speed parameter configuration is powerparameter configuration with a data transmission rate lower than thedata transmission rate threshold, a search path whose number is greaterthan the search path threshold and channel estimation precision greaterthan the channel estimation precision threshold.

Optionally, the power offset parameter configuration includes:

a reference E-DCH transport format combination indicator E-TFCI and areference power offset, and/or a hybrid automatic repeat request poweroffset HARQ PO of each media access control MAC-d flow.

After determining the power offset parameter configuration correspondingto the resource state, the method includes:

setting the reference E-TFCI and the reference power offset according tothe determined power offset parameter configuration;

or, setting the HARQ PO for each MAC-d flow according to the determinedpower offset parameter configuration;

or, setting the reference E-TFCI, the reference power offset and theHARQ PO for each MAC-d flow according to the determined power offsetparameter configuration.

Optionally, before determining the resource state of the terminalaccording to the data throughput rate and a preset threshold, the methodincludes: detecting that the data throughput rate on a data channel ischanged.

The method for determining a power offset parameter provided in thepresent invention includes: receiving power offset parameterconfiguration sent by a radio network control device, where the poweroffset parameter configuration is determined by the radio networkcontrol device according to data throughput rate and/or cell resourceusage state of a terminal, and a corresponding threshold; and settingthe power offset parameter of the terminal according to the power offsetparameter configuration.

Optionally, the power offset parameter configuration includes:

a reference E-TFCI and a reference power offset, or a hybrid automaticrepeat request power offset HARQ PO for each MAC-d flow.

The setting the power offset parameter of the terminal according to thepower offset parameter configuration includes:

setting the reference E-TFCI and the reference power offset according tothe determined power offset parameter configuration;

or, setting the HARQ PO for each MAC-d flow according to the determinedpower offset parameter configuration;

or, setting the reference E-TFCI, the reference power offset and theHARQ PO for each MAC-d flow according to the determined power offsetparameter configuration.

Optionally, the cell resource usage state includes: uplink load or usercount of at least one cell in serving cells of the terminal; and/oruplink load or user count of at least one cell in active set cells ofthe terminal.

The radio network control device provided in the present inventionincludes: a resource obtaining unit, configured to obtain datathroughput rate and/or cell resource usage state of a terminal; aconfiguration determining unit, configured to determine power offsetparameter configuration corresponding to according to the datathroughput rate and/or the cell resource usage state, and acorresponding threshold; and a configuration sending unit, configured tosend the power offset parameter configuration to the terminal, so thatthe terminal determines the power offset parameter according to thepower offset parameter configuration.

Optionally, the configuration determining unit includes:

a first state determining module, configured to determine a throughputrate state of the terminal according to the data throughput rate and acorresponding throughput rate threshold, where the throughput rate stateincludes at least one of a first throughput rate state and a secondthroughput rate state, where the first throughput rate state indicatesthat the data throughput rate is greater than or equal to the firstthroughput rate threshold, the second throughput rate state indicatesthat the data throughput rate is smaller than or equal to the secondthroughput rate threshold; and the first throughput rate threshold isgreater than or equal to the second throughput rate threshold; and/or,

a second state determining module, configured to determine a user countstate or an uplink load state according to the cell resource usage stateand a corresponding threshold, where the user count state includes atleast one of a first user count state and a second user count state,where the first user count state indicates that user count is greaterthan or equal to a first user count threshold; the second user countstate indicates that the user count is smaller than or equal to a seconduser count threshold, and the first user count threshold is greater thanor equal to the second user count threshold; the uplink load stateincludes at least one of a first uplink load state and a second uplinkload state, where the first uplink load state indicates that uplink loadis greater than or equal to a first uplink load threshold, and thesecond uplink load state indicates that the uplink load is smaller thanor equal to a second uplink load threshold; and the first uplink loadthreshold is greater than or equal to the second uplink load threshold.

Optionally, the configuration determining unit includes:

a first configuration determining module, configured to determine thepower offset parameter configuration as low-speed parameterconfiguration if the data throughput rate of the terminal is in thefirst throughput rate state; or, determine the power offset parameterconfiguration as high-speed parameter configuration if the datathroughput rate of the terminal is in the second throughput rate state;and/or,

a second configuration determining module, configured to determine thepower offset parameter configuration as low-speed parameterconfiguration if a cell resource of a serving cell or at least one cellin active set cells of the terminal is in the first user count state orthe first uplink load state; or, determine the power offset parameterconfiguration as high-speed parameter configuration if a cell resourceof a serving cell of the terminal is in the second user count state orthe second uplink load state; and/or,

a third configuration determining module, configured to determine thepower offset parameter configuration as low-speed parameterconfiguration if the throughput rate of the terminal is in the secondthroughput rate state and a cell resource of the serving cell or the atleast one cell in the active set cells of the terminal is in the firstuplink load state.

The low-speed parameter configuration is power parameter configurationwith a data transmission rate lower than a data transmission ratethreshold, a search path whose number is greater than a search paththreshold and channel estimation precision greater than a channelestimation precision threshold; and the high-speed parameterconfiguration is power parameter configuration with a data transmissionrate higher than the data transmission rate threshold, a search pathwhose number is smaller than the search path threshold and channelestimation precision greater than the channel estimation precisionthreshold.

Optionally, the radio network control device further includes: adetecting unit, configured to detect whether data throughput rate on adata channel is changed and trigger the detecting unit if the datathroughput rate is changed; and

a parameter setting unit, configured to set a reference E-TFCI and areference power offset according to the determined power offsetparameter configuration; or, set an HARQ PO for each MAC-d flowaccording to the determined power offset parameter configuration; or,set a reference E-TFCI, a reference power offset and an HARQ PO for eachMAC-d flow according to the determined power offset parameterconfiguration.

The terminal provided in the present invention includes: a configurationreceiving unit, configured to receive power offset parameterconfiguration sent by a radio network control device, where the poweroffset parameter configuration is determined by the radio networkcontrol device according to data throughput rate and/or cell resourceusage state of a terminal, and a corresponding threshold; and a settingunit, configured to set a power offset parameter of the terminalaccording to the power offset parameter configuration.

Optionally, the setting unit 802 may include:

a first setting module, configured to set a reference E-TFCI and areference power offset according to the determined power offsetparameter configuration;

and/or, a second setting module, configured to set an HARQ PO for eachMAC-d flow according to the determined power offset parameterconfiguration.

Optionally, the cell resource usage state includes uplink load or usercount of at least one cell in serving cells of the terminal, and/or, theuplink load or the user count of at least one cell in active set cellsof the terminal.

It may be seen from the technical solutions that the embodiments of thepresent invention adjust, by determining in which throughput rate statethe uplink data throughput rate of the terminal is, the power offsetparameter configuration of the terminal into the power offset parameterconfiguration corresponding to a belonged throughput rate state, so thatthe terminal, in a scenario of different high and low-speed datathroughput rate, may obtain power offset parameters adaptive to thescenario to implement optimal configuration of resources so as tomaximum the uplink throughput rate.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a method for determining a power offsetparameter according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of a method for determining a power offsetparameter according to another embodiment of the present invention;

FIG. 3 is a schematic diagram of a method for determining a power offsetparameter according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of a method for determining a power offsetparameter according to another embodiment of the present invention;

FIG. 5 is a schematic diagram of a method for determining a power offsetparameter according to another embodiment of the present invention;

FIG. 6 is a schematic diagram of a method for determining a power offsetparameter according to another embodiment of the present invention;

FIG. 7 is a schematic structural diagram of a radio network controldevice according to the present invention; and

FIG. 8 is a schematic structural diagram of a terminal according to thepresent invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Embodiments of the present invention provide a method and an apparatusfor determining a power offset parameter, for dynamically determiningpower offset parameter configuration adaptive to a current network stateof a terminal.

Referring to FIG. 1, a method for determining a power offset parameteraccording to one embodiment of the present invention includes:

101. Obtain data throughput rate of a terminal and/or cell resourceusage state of a terminal.

In this embodiment, the data throughput rate and/or cell resource usagestate of the terminal may be obtained by a radio network control device.

In practical application, the radio network control device in theembodiment of the present invention may be a radio network controller(RNC, Radio Network Controller) or an evolved NodeB, and is not limitedhere.

Optionally, the cell resource usage state may be user count or uplinkload of at least one cell in serving cells of the terminal, and/or,uplink load or user count of at least one cell in active set cells ofthe terminal. That is, when a resource state of the terminal isdetermined according to the cell resource usage state, the user count orthe uplink load of at least one cell of the serving cells of theterminal may be independently considered, or the uplink load or the usercount of at least one cell in the active set cells of the terminal alsomay be independently considered, or the uplink load or the user count ofat least one cell in the serving cells and the active set cells of theterminal may be integrally considered.

Specifically, the radio network control device may detect data usage ofthe terminal on a data channel (for example, an E-DPDCH channel) byusing its own Radio Link Control (RLC, Radio Link Control) entity, andcalculate the data throughput of the terminal on the data channelaccording to the data usage.

102. Determine the resource state of the terminal.

For example, the radio network control device may determine the resourcestate of the terminal according to the data throughput rate and/or cellresource usage state of the terminal, and a corresponding threshold.

Specifically, if the cell resource usage state is the user count of thecell, a preset threshold is user count threshold; if the cell resourceusage state is the uplink load of the cell, the preset threshold is anuplink load threshold; and a preset threshold corresponding to the datathroughput rate of the terminal may be called a throughput ratethreshold. No matter to which types the cell resource usage state andthe preset threshold belong, the resource state includes at least onetype and the at least one type of resource state is corresponding topower offset parameter configuration of at least one level,respectively, so that the radio network control device selects poweroffset parameter configuration adaptive to a current resource state toimplement data transmission.

The resource state may be determined separately according to the datathroughput rate or the cell resource usage state of the terminal, or maybe further determined integrally according to the data throughput rateand the cell resource usage state of the terminal.

103. Determine the power offset parameter configuration corresponding tothe resource state.

The radio network control device determines the power offset parameterconfiguration corresponding to the resource state according to thedetermined resource state.

In the embodiments of the present invention, power offset parameterconfiguration corresponding to each resource state may be preset.Optionally, it is allowable to only preset one or two resource states orpreset more resource states; in other word, multi-level power offsetparameter configuration is set, so that the power offset parameterconfiguration is more precise.

After determining the power offset parameter configuration correspondingto the terminal, the radio network control device may set the poweroffset parameter of the terminal locally according to the power offsetparameter configuration.

104. Send the power offset parameter configuration to the terminal.

The radio network control device sends the power offset parameterconfiguration to the terminal, so that the terminal determines the poweroffset parameter.

After the radio network control device determines the power offsetparameter configuration currently adaptive to the terminal, the radionetwork control device may send the power offset parameter configurationto the terminal, so that the terminal may set the power offset parameteraccording to the power offset parameter configuration, and thereforeimplementing data transmission according to the power offset parameter.

Optionally, in step 104, the power offset parameter configuration may besent to all terminals in the cell; if the data throughput rate of oneterminal is obtained in step 101, the power offset parameterconfiguration is sent to the corresponding terminal in step 104.

In the present invention, the power offset parameter configuration ofthe terminal is adjusted to make it be the power offset parameterconfiguration corresponding to the resource state by determining theresource state of the terminal, so that the terminal may obtain, in ascenario of different resource states, the power offset parameteradaptive to the scenario to implement optimal configuration ofresources.

The following uses power offset parameter configuration of a terminalduring data transmission as an example to illustrate a method fordetermining a power offset parameter of the present invention. Referringto FIG. 2, a method for a determining power offset parameter accordingto another embodiment of the present invention includes:

201. A radio network control device obtains data throughput rate of aterminal on a data channel.

In practical application, the radio network control device in theembodiment of the present invention may be an RNC or an evolved NodeB,and is not limited here.

Specifically, the radio network control device may perform entitydetection on data usage of the terminal on the data channel (forexample, an E-DPDCH channel) by its own RLC and calculate the datathroughput rate of the terminal on the data channel according to thedata usage.

202. The radio network control device determines a resource state of theterminal.

The radio network control device may determine the resource state of theterminal according to the data throughput rate of the terminal on thedata channel and a preset threshold.

Specifically, the resource state may be shown as a throughput rate statewhen data transmission has occurred; moreover, there is at least onethroughput rate state. For example, one throughput rate threshold (inother word, a preset threshold) may be set if impacts on the terminalcaused by frequently adjusting power offset parameter configuration arenot considered; therefore, two throughput rate states may be determinedby the preset threshold. Certainly, it may be only determined whetherthe throughput rate is greater than a state of the threshold or smallerthan the state of the threshold by one throughput rate threshold, whichis not limited in this embodiment. If it needs to prevent frequentadjustments on the power offset parameter configuration, two throughputrate thresholds may be set; there are three throughput rate statesaccordingly. In this way, the data throughput rate of the terminal onthe data channel may have a reciprocating buffer zone; in other word,the current power offset parameter configuration may not be adjustedwhen the data throughput rate is in a middle throughput rate state.Specifically, the throughput rate states may include a first throughputrate state, a second throughput rate state and a third throughput ratestate, where the data throughput rate greater than or equal to a firstthroughput rate threshold belongs to the first throughput rate state;the data throughput rate between the first throughput rate threshold anda second throughput rate threshold (in other word, a threshold smallerthan the first throughput rate threshold and greater than the secondthroughput rate threshold) belongs to the third throughput rate state;the data throughput rate smaller than or equal to the second throughputrate threshold belongs to the second throughput rate state; and thefirst throughput rate threshold is greater than the second throughputrate threshold. In the embodiment of the present invention,corresponding power offset parameter configuration is preset for eachthroughput rate state. Optionally, more throughput rate states may bepreset for the terminal; that is, multi-level power offset parameterconfiguration is set, so that the power offset parameter configurationis more precise.

Optionally, the resource state of the terminal may be determinedaccording to the cell resource usage state when data transmission hasalready occurred on the terminal. The cell resource usage state may beuplink load or user count of a serving cell or at least one cell inactive set cells of the terminal. Specifically,

the radio network control device may determine a user count state or anuplink load state according to the cell resource usage state and acorresponding threshold. The user count state includes at least one of afirst user count state and a second user count state, where the firstuser count state indicates that user count is greater than or equal to afirst user count threshold; the second user count state indicates thatthe user count is smaller than or equal to a second user countthreshold, and the first user count threshold is greater than or equalto the second user count threshold.

The uplink load state includes at least one of a first uplink load stateand a second uplink load state, where the first uplink load stateindicates that uplink load is greater than or equal to a first uplinkload threshold; the second uplink load state indicates that the uplinkload is smaller than or equal to a second uplink load threshold; and thefirst uplink load threshold is greater than or equal to the seconduplink load threshold.

203. The radio network control device determines and sets the poweroffset parameter configuration corresponding to the resource state.

The radio network control device determines the power offset parameterconfiguration corresponding to the resource state according to thedetermined resource state.

Specifically, the radio network control device determines the poweroffset parameter configuration according to a determination result ofthe throughput rate state. In the embodiment of the present invention,each throughput rate state is preset with corresponding power offsetparameter configuration, where the power offset parameter configurationmay include specific parameter content (for example, an E-TFCI and areference power offset) and configuration of the power content, or mayinclude a policy of a set of configuration (for example: keeping thecurrent parameter unchanged). Like the first throughput rate state,values of the data throughput rate in the first throughput rate stateare higher throughput rate. If the data throughput rate of the terminalon the data channel is in the first throughput rate state, a poweroffset parameter with lower speed may be configured for the terminal, sothat the terminal may obtain higher multi-path search and channelestimation precisions, and therefore obtain optimal uplink high-speeddata transmission performance.

After determining the power offset parameter configuration correspondingto the terminal, the radio network control device sets the power offsetparameter of the terminal locally according to the power offsetparameter configuration.

Optionally, if the data throughput rate obtained in step 201 is averagedata throughput rate of all the terminals in one cell, the power offsetparameter set in step 203 is a power offset parameter of all theterminals in the cell. If the data throughput obtained in step 201 isthe data throughput rate of one terminal, the power offset parameter setin step 203 is a power offset parameter of the corresponding terminal.

Optionally, if the resource state of the terminal is determinedaccording to the cell resource usage state, the power offset parameterconfiguration is determined as low-speed parameter configuration if thecell resource of the serving cell or the at least one cell in the activeset cells of the terminal is in the first user count state or the firstuplink load state; where the low-speed parameter configuration isparameter configuration with a lower data transmission rate, a greatersearch path and a higher channel estimation precision. Or, the poweroffset parameter configuration is determined as high-speed parameterconfiguration if the resource of the serving cell of the terminal is inthe second user count state or the second uplink load state; where thehigh-speed parameter configuration is parameter configuration with ahigher data transmission rate, a greater search path and a lower channelestimation precision. Understandably, a data transmission ratethreshold, a search path threshold and channel estimation precisionthreshold exist in practical application and values of the thresholdsmay be set according to an actual requirement. This is not limited inthe embodiment of the present invention. The smaller or greater (more orless) is relative to the values of the thresholds. For example, thehigher data transmission rate may refer to that the data transmissionrate is greater than the data transmission rate threshold. In the sameway, descriptions of smaller or greater (more or less) in the searchpath and the channel estimation precision also have similar meanings.Unnecessary details are not described here.

204. The radio network control device sends the power offset parameterconfiguration to the terminal.

The radio network control device sends the power offset parameterconfiguration to the terminal, so that the terminal determines the poweroffset parameter.

After the radio network control device determines power offset parameterconfiguration currently adaptive to the terminal, the radio networkcontrol device may send the power offset parameter configuration to theterminal, so that the terminal may set the power offset parameteraccording to the power offset parameter configuration, therebyimplementing data transmission according to the power offset parameter.

To help understanding, the embodiment is described in detail by using aspecific application scenario. Referring to FIG. 3, a method fordetermining a power offset parameter according to another embodiment ofthe present invention includes:

301. A radio network control device obtains data throughput rate of aterminal on an enhanced data channel.

The radio network control device obtains the data throughput rate of theterminal on the data channel (for example, E-DPDCH).

In the embodiment of the present invention, the radio network controldevice may obtain the data throughput rate of the terminal on the datachannel according to data usage of the terminal on the data channel in apreset time period T. For example, the data throughput rate is equal tothe data usage which is obtained by dividing total data usage on thedata channel in a preset time period T by the preset time period T.Understandably, the data throughput rate may be updated periodically.That is, the data throughput rate in a next preset time period T may bedifferent from the data throughput rate in a previous preset time periodT. However, if the data throughput rate is not changed, the power offsetparameter of the terminal may be kept unchanged all the time. That is,step 302 may be performed before to which state the data throughput ratebelongs is determined.

302. The radio network control device detects whether the datathroughput rate of the terminal on the enhanced data channel is changed.

In the embodiment of the present invention, the radio network controldevice may detect whether the data throughput rate in the current presettime period T is changed when being compared with the data throughputrate in the previous preset time period T. If the data throughput rateis changed, subsequent step 303 is triggered; if the data throughputrate is not changed, a process of setting the power offset parameter maybe stopped.

303. The radio network control device determines a throughput rate stateof the terminal.

The radio network control device may determine the throughput rate stateof the terminal according to the data throughput rate of the terminal onthe data channel and a preset threshold.

In the embodiment of the present invention, in view of impacts on thetransmission speed of the terminal, three throughput rate states andpower offset parameter configuration at two levels (high-speed parameterconfiguration and low-speed parameter configuration) may be set, wherethe three throughput rate states are a first throughput rate state, asecond throughput rate state and a third throughput rate state,respectively; where the data throughput rate greater than or equal to afirst throughput rate threshold belongs to the first throughput ratestate; the data throughput rate between the first throughput ratethreshold and a second throughput rate threshold (in other word, athreshold smaller than the first throughput rate threshold and greaterthan the second throughput rate threshold) belongs to the thirdthroughput rate state; and the data throughput rate smaller than orequal to the second throughput rate threshold belongs to the secondthroughput rate state. The first throughput rate threshold is greaterthan the second throughput rate threshold; that is, the first throughputrate state is an interval corresponding to the high-speed parameterconfiguration. The third throughput rate state is a buffer interval;that is, when the data throughput rate is smaller than the firstthroughput rate threshold and greater than the second throughput ratethreshold, the data throughput rate may be considered as a reasonablespeed fluctuation. In this interval, the current power offset parameterconfiguration may be kept unchanged; while the second throughput ratestate is an interval corresponding to the low-speed parameterconfiguration.

304. The radio network control device determines and sets the poweroffset parameter configuration corresponding to the throughput ratestate.

The radio network control device determines the power offset parameterconfiguration corresponding to the throughput rate state according tothe determined throughput rate state.

The radio network control device sets a power offset parameterconfiguration corresponding to a local terminal into the power offsetparameter configuration corresponding to the throughput rate stateaccording to a determining result of the throughput rate state, whereeach throughput rate state may be preset with a corresponding poweroffset configuration parameter.

Optionally, if the data throughput rate belongs to the first throughputrate state, the power offset parameter configuration of the terminal isadjusted to make it be low-speed parameter configuration; therefore,power load occupied by DPCCH will be reduced; at this moment, more powerload may be used by the data channel, and data transmission performancemay be improved by a certain extent. If the data throughput rate belongsto the third throughput rate state, the current power offset parameterconfiguration may be kept unchanged; that is, the current power offsetparameter configuration may be adaptive to the current transmissionscenario. If the data throughput rate belongs to the second throughputrate state, the power offset parameter configuration of the terminal isadjusted to make it be a high-speed parameter configuration, so that athroughput of a HSUPA cell of a HSUPA terminal may be improved.

The adjusted power offset parameter configuration not only may be areference E-TFCI and a reference power offset parameter configured forthe terminal, but also may be an HARQ PO configured for each MAC-d flow.Because no matter which type of power offset is adjusted, a power offsetcorresponding to each transmission block at a terminal device end may bechanged. The reference E-TFCI and the reference power offset may bedynamically adjusted if the HARQ PO configured for each MAC-d flow isdifferent before the present invention is applied.

Optionally, in the embodiment of the present invention, initial poweroffset parameter configuration of the terminal may be preconfigured intohigh-speed parameter configuration or low-speed parameter configurationaccording to actual situations. Specifically, one power offset parameterconfiguration may be selected by the radio network control deviceself-adaptively according to a congestion state of the uplink load; ifthe load is congested or more users are accessed, the radio networkcontrol device automatically selects low-speed parameter configurationfor the terminal so as to reduce load occupancy of the terminal;conversely, high-speed parameter configuration is selected.

Specific content of the power offset parameter configuration mayinclude: such parameters as the reference E-TFCI and the reference poweroffset (the power offset of an E-DPDCH relative to a DPCCH), and/or theHARQ PO for each MAC-d flow, and the like.

Specifically:

(1) configuration of a reference E-TFCI and reference power offset maybe unchanged, and configuration of an HARQ PO may be adjusted; forexample, the HARQ PO is configured to 5 dB in low-speed parameterconfiguration; and the HARQ PO is configured to 0 dB in high-speedparameter configuration;

(2) or, the HARQ PO may be unchanged, and the configuration of thereference E-TFCI and the reference PO may be adjusted; for example, theHARQ PO is always set as 0 dB; however, in the high-speed parameterconfiguration, the reference E-TFCI and the reference PO are:

Reference E-TFCI Reference PO 1 11 3 13 . . . . . .

The configuration of the E-TFCI and the reference PO may beconfiguration with only one group of numbers such as “1” and “11”, andmay be further configuration with a plurality of groups of numbers whichare represented by ellipsis here and is not described again.

However, the configuration of the E-TFCI and the reference PO in thelow-speed parameter configuration is:

Reference E-TFCI Reference PO 1 16 3 18 . . . . . .

(3) All the configuration of the reference E-TFCI, the reference PO andthe HARQ PO may be adjusted. Assume that initial configuration of (1)and (2) is high-speed parameter configuration, then the configuration ofthe reference E-TFCI and the reference PO in the low-speed parameterconfiguration is:

Reference E-TFCI Reference PO 1 16 3 18 . . . . . .

Moreover, HARQ PO=3 dB.

305. The radio network control device sends the power offset parameterconfiguration to the terminal.

The radio network control device sends the power offset parameterconfiguration to the terminal, so that the terminal determines the poweroffset parameter.

After the radio network control device determines the power offsetparameter configuration currently adaptive to the terminal, the radionetwork control device sends the power offset parameter configuration tothe terminal, so that the terminal may set the power offset parameteraccording to the power offset parameter configuration, therebyimplementing data transmission according to the power offset parameter.For a specific way for setting the power offset parameter of theterminal, reference may be made to content described in step 304; andunnecessary details are not described here.

Application scenarios in the embodiments of the present invention areonly described above by some examples. Understandably, more applicationscenarios may exist in practical application, which is not limited here.

It should be noted that an event trigger mechanism is adopted forconfiguring the power offset parameter of the embodiment of the presentinvention. Optionally, a periodical mechanism may be further adopted bythe present invention; that is, the step of determining to whichthroughput rate state the current data throughput rate belongs istriggered in each preset time slot. The specific way to be adopteddepends on practical situations, which is not limited here.

Because the data throughput rate of the terminal on the data channel mayfluctuate, in order to prevent the “Ping Pang” problem on adjusting thepower offset parameter, in other word, to frequently switch the poweroffset parameter, the present invention further proposes correspondingtechnical solutions. Referring to FIG. 4, a method for determining poweroffset parameter according to another embodiment of the presentinvention includes:

401. A radio network control device obtains data throughput rate of aterminal on an enhanced data channel.

The radio network control device obtains the data throughput rate of theterminal on an E-DPDCH.

In the embodiment of the present invention, the radio network controldevice may obtain the data throughput rate of the terminal on the datachannel according to data usage of the terminal on the data channel in apreset time period T; for example, the data throughput rate is equal tothe data usage which is obtained by dividing total data usage on thedata channel in the preset time period T by the preset time period T.Understandably, the data throughput rate may be updated periodically;that is, the data throughput rate in a next preset time period T may bedifferent from the data throughput rate in the previous preset timeperiod T. However, if the data throughput rate is not changed, the poweroffset parameter of the terminal may be kept unchanged all the time.That is, step 402 may be performed before to which state the datathroughput rate belongs is determined.

402. The radio network control device detects whether the datathroughput rate of the terminal on the enhanced data channel is changed.

In the embodiment of the present invention, the radio network controldevice may detect whether the data throughput rate in the current presettime period T is changed when being compared with the data throughputrate in the previous preset time period T. If the data throughput rateis changed, a subsequent step 403 is triggered; if the data throughputrate is not changed, a process of setting the power offset parameter maybe stopped.

403. The radio network control device determines a throughput rate stateof the terminal.

The radio network control device may determine the throughput rate stateof the terminal according to the data throughput rate of the terminal onthe data channel and a preset threshold.

In the embodiment of the present invention, in view of impacts on thetransmission speed of the terminal, three throughput rate states andpower offset parameter configuration at two levels (high-speed parameterconfiguration and low-speed parameter configuration) may be set, wherethe three throughput rate states are a first throughput rate state, asecond throughput rate state and a third throughput rate state,respectively; where the data throughput rate greater than or equal to afirst throughput rate threshold belongs to the first throughput ratestate; the data throughput rate between the first throughput ratethreshold and a second throughput rate threshold (in other word, athreshold smaller than the first throughput rate threshold and greaterthan the second throughput rate threshold) belongs to the thirdthroughput rate state; and the data throughput rate smaller than orequal to the second throughput rate threshold belongs to the secondthroughput rate state.

Step 404 may be triggered firstly if the data throughput rate of theterminal on the data channel belongs to the second throughput ratestate; and step 406 may be performed directly if the data throughputrate of the terminal on the data channel belongs to the first throughputrate state or the third throughput rate state.

404. The radio network control device obtains uplink load of a servingcell or at least one cell in active set cells of the terminal.

Here, it may be that the radio network control device obtains uplinkload terminal of the serving cell or the at least one cell in the activeset cells of the terminal.

405. The radio network control device determines uplink load state ofthe terminal.

The uplink load state of the terminal is determined as a first uplinkload state if the radio network control device judges that the uplinkload of the serving cell of the terminal is greater than a first uplinkload threshold; or, the uplink load state of the terminal is determinedas the first uplink load state if the radio network control devicejudges that the uplink load of at least one cell in the active set cellsof the terminal is greater than the first uplink load threshold.

The first uplink load threshold is a threshold for determining whetherthe uplink load is restricted. When there are more users or uplinkcaches of partial terminals are sufficient, the radio network controldevice may consider that it is not possible for the terminal to increasespeed in a longer subsequent time period (in other word, the uplink loadis restricted); however, it is reasonable to adjust the power offsetparameter configuration of the terminal as low-speed parameterconfiguration; because a load situation of the terminal may befluctuated if the uplink load of the cell of the terminal is notrestricted. In order to prevent the “Ping Pang” problem on adjusting thepower offset parameter, that is, to frequently switch the power offsetparameter, the embodiment of the present invention may not adjust thepower offset parameter configuration as low-speed parameterconfiguration in the case that the uplink load is not restricted.

In practical application, a relative threshold (for example, 90%) is setfor the uplink load threshold, and an absolute load threshold is75%×90%=67.5% (assume that a target value of the uplink load is 75%).Generally, the speed of the terminal is still possible to increase ifthe uplink load is not restricted. At this moment, adjusting fromhigh-speed parameter configuration to low-speed parameter configurationis not implemented even if the current throughput rate meets a lowthreshold so as to prevent “Ping Pang” problem caused by fluctuation ofthe throughput rate.

406. The radio network control device determines and sets the poweroffset parameter configuration corresponding to the resource state.

The radio network control device determines the power offset parameterconfiguration corresponding to the resource state according to thedetermined throughput rate state and uplink load state.

In the embodiment of the present invention, the uplink load state may beintegrally considered when determining the power offset parameterconfiguration. If the data throughput rate belongs to the firstthroughput rate state and the uplink load of the terminal is restricted(in other word, the terminal is in the first uplink load state), it isnot possible for the terminal to increase speed in a longer subsequenttime period; however, it is reasonable to adjust the power offsetparameter configuration of the terminal as low-speed parameterconfiguration at this moment. If the uplink load of the terminal is notrestricted (in other word, the terminal is not in the first uplink loadstate), the corresponding power offset parameter configuration may notbe set as low-speed parameter configuration even if the terminal is inthe first throughput rate state.

Specifically, the power offset parameter configuration of the terminalis adjusted to make it be low-speed parameter configuration if the datathroughput rate is in the first throughput rate state and the resourceof the serving cell or the at least one cell in the active set cells ofthe terminal is in the first upload state. Specifically, the terminalmay be configured with configuration capable of obtaining a lowerreference power offset of the E-DPDCH relative to the DPCCH, or a lowerHARQ PO parameter for each MAC-d flow to reduce unnecessary uplink DPCCHpower load to the greatest extent in case of meeting multi-path searchand channel estimation precision needed by low-speed data transmission,so that more uplink load is used for transmitting terminal data, andtherefore obtaining optimal uplink low-speed data transmissionperformance. The current power offset parameter configuration is keptunchanged if the data throughput rate is in the first throughput ratestate and the cell resource of the serving cell or at least one cell inthe active set cells of the terminal is in a non-first uplink loadstate, or the data throughput rate is in the third throughput ratestate. The power offset parameter configuration of the terminal isadjusted to make it be high-speed parameter configuration if the datathroughput rate is in the second throughput rate state. Specifically,the terminal may be configured with configuration capable of obtaining ahigher reference power offset of the E-DPDCH relative to the DPCCH, or ahigher HARQ PO parameter for each MAC-d flow so as to obtain highermulti-path search and channel estimation precision, and thereforeobtaining optimal uplink high-speed data transmission performance.

407. The radio network control device sends the power offset parameterconfiguration to the terminal.

The radio network control device sends the power offset parameterconfiguration to the terminal, so that the terminal determines the poweroffset parameter.

After determining the power offset parameter configuration currentlyadaptive to the terminal, the radio network control device needs to sendthe power offset parameter configuration to the terminal, so that theterminal may set the power offset parameter according to the poweroffset parameter configuration, thereby implementing data transmissionaccording to the power offset parameter. For a specific way for settingthe power offset parameter of the terminal, reference may be made tocontent described in step 304; and unnecessary details are not describedhere.

The following uses power offset parameter configuration of a terminalduring initial access as an example and assumes that the terminal doesnot implement data transmission during the initial access, to illustratea method for determining a power offset parameter of the presentinvention. Referring to FIG. 5, the method for determining the poweroffset parameter according to another embodiment of the presentinvention includes:

501. A radio network control device obtains user count of a serving cellor at least one cell in active set cells of a terminal.

The radio network control device obtains user count of a serving cell orat least one cell in active set cells. Optionally, the radio networkcontrol device may further obtain uplink load of the serving cell or theat least one cell in the active set cells. Because the methods fordetermining a resource state by the user count or the uplink load aresimilar, the embodiment of the present invention only illustrates themethods by using the user count as an example; and “the method fordetermining the resource state by the uplink load” is not describedagain.

In the embodiment of the present invention, because the terminal doesnot transmit data, data throughput rate of the terminal cannot beobtained.

502. The radio network control device determines a resource state of theterminal.

The radio network control device may determine the resource state of theterminal according to the user count and a preset user count threshold.At least one resource state is included.

Specifically, the radio network control device may set a user countthreshold. When the user count obtained by the radio network controldevice is greater than or equal to a first user count threshold, theterminal is in a first user count state (in other word, one resourcestate therein). When the user count obtained by the radio networkcontrol device is smaller than or equal to a second user countthreshold, the terminal is in a second user count state. Similar to thethroughput rate state, more than two levels may be further set for theuser count state, so that the power offset parameter configuration ismore precise. However, if more user count states are set, speedsmoothness may be affected; moreover, more air interface signallingreconfiguration may directly increase a call drop risk of the terminal.

503. The radio network control device determines and sets the poweroffset parameter configuration corresponding to the resource state.

The radio network control device determines the power offset parameterconfiguration corresponding to the user count state according to thedetermined user count state.

Specifically, the radio network control device determines the poweroffset parameter configuration corresponding to the user count stateaccording to a determination result of the user count state. If theterminal is in the first user count state (that is, the number ofaccessed users is large), the radio network control device determinesthe power offset parameter configuration corresponding to the terminalas low-speed parameter configuration. If the terminal is in the seconduser count state (that is, the number of accessed users is small), theradio network control device determines the power offset parameterconfiguration corresponding to the terminal as high-speed parameterconfiguration.

After determining the power offset parameter configuration correspondingto the terminal, the radio network control device sets the power offsetparameter of the terminal locally according to the power offsetparameter configuration.

504. The radio network control device sends the power offset parameterconfiguration to the terminal.

The radio network control device sends the power offset parameterconfiguration to the terminal, so that the terminal determines the poweroffset parameter.

After determining the power offset parameter configuration currentlyadaptive to the terminal, the radio network control device needs to sendthe power offset parameter configuration to the terminal, so that theterminal may set the power offset parameter according to the poweroffset parameter configuration, thereby implementing data transmissionaccording to the power offset parameter.

The method for determining the power offset parameter in the embodimentof the present invention is described above from an aspect of the radionetwork control device. The method for determining the power offsetparameter in the embodiment of the present invention is described belowfrom an aspect of the terminal. Referring to FIG. 6, a method fordetermining a power offset parameter according to another embodiment ofthe present invention includes:

601. A terminal receives power offset parameter configuration sent by aradio network control device.

The terminal receives the power offset parameter configuration sent bythe radio network control device, where the power offset parameterconfiguration is determined by the radio network control deviceaccording to data throughput rate and/or cell resource usage state ofthe terminal, and a corresponding threshold.

Optionally, the cell resource usage state may be user count or uplinkload of at least one cell in serving cells of the terminal, and/or,uplink load or user count of at least one cell in active set cells ofthe terminal.

Specifically, after the radio network control device determines thepower offset parameter configuration currently adaptive to the terminal,the radio network control device may send the power offset parameterconfiguration to the terminal, so that the terminal may set the poweroffset parameter according to the power offset parameter configuration,thereby implementing data transmission according to the power offsetparameter.

Specific content of the power offset parameter configuration mayinclude: such parameters as a reference E-TFCI and a reference poweroffset, and/or an HARQ PO for each MAC-d flow, and the like. Moreover,the power offset parameter configuration may include specific parametercontent and relevant configuration (for example, E-TFCI and referencepower offset), and may be further a policy of a set of configuration(for example, keeping the current parameter unchanged). A specificrealization mode of the power offset parameter configuration may bedecided according to practical situations and is not limited here.

602. The terminal sets the power offset parameter of the terminalaccording to the power offset parameter configuration.

The terminal sets the power offset parameter of the terminal accordingto the power offset parameter configuration. Specifically, the methodfor setting the power offset parameter may be decided according tocontent of the power offset parameter configuration; for example:

if the power offset parameter configuration is a policy of a set ofconfiguration such as keeping the current parameter unchanged, theterminal does not need to modify the current power offset parameter; ifthe power offset parameter configuration is a specific parameter content(for example, the E-TFCI and the reference power offset) andconfiguration of the parameter content, the terminal may set theparameter according to the parameter content in the power offsetparameter configuration, specifically:

(1) Configuration of a reference E-TFCI and a reference power offset maybe unchanged, and configuration of an HARQ PO may be adjusted; forexample, the HARQ PO is configured as 5 dB in low-speed parameterconfiguration; and the HARQ PO is configured as 0 dB in high-speedparameter configuration.

(2) Or, the HARQ PO may be unchanged, and the configuration of thereference E-TFCI and the reference PO may be adjusted; for example, theHARQ PO is always set as 0 dB; however, in the high-speed parameterconfiguration, the reference E-TFCI and the reference PO are:

Reference E-TFCI Reference PO 1 11 3 13 . . . . . .

The configuration of the E-TFCI and the reference PO may beconfiguration with only one group of numbers such as “1” and “11”, andmay be further configuration with a plurality of groups of numbers whichare represented by ellipsis here and is not described again.

However, the configuration of the E-TFCI and the reference PO in thelow-speed parameter configuration is:

Reference E-TFCI Reference PO 1 16 3 18 . . . . . .

(3) All the configuration of the reference E-TFCI, the reference PO andthe HARQ PO may be adjusted. Assume that initial configuration of (1)and (2) is high-speed parameter configuration, then the reference E-TFCIand the reference PO in the low-speed parameter configuration are:

Reference E-TFCI Reference PO 1 16 3 18 . . . . . .

Moreover, HARQ PO=3 dB.

The radio network control device configured to dynamically adjust thepower offset parameter according to the embodiment of the presentinvention is illustrated below. For a logical structure of the radionetwork control device, reference may be made to FIG. 7. A radio networkcontrol device according to one embodiment of the present inventionincludes:

a resource obtaining unit 701, configured to obtain data throughput rateand/or cell resource usage state of a terminal;

a state determining unit 702, configured to determine the resource stateof the terminal according to the data throughput rate and/or the cellresource usage state, and a corresponding threshold;

a configuration determining unit 703, configured to determine the poweroffset parameter configuration corresponding to the resource stateaccording to the determined resource state; and

a configuration sending unit 704, configured to send the power offsetparameter configuration to the terminal, so that the terminal determinesthe power offset parameter according to the power offset parameterconfiguration.

The radio network control device in the embodiment of the presentinvention may further include:

a detecting unit 705, configured to detect whether the data throughputrate on a data channel is changed and trigger the state determining unitif the data throughput rate is changed.

Optionally, the radio network control device further includes aparameter setting unit, configured to set a reference E-TFCI and areference power offset according to the determined power offsetparameter configuration; or, set an HARQ PO for each MAC-d flowaccording to the determined power offset parameter configuration; or,set the reference E-TFCI, the reference power offset and the HARQ PO foreach MAC-d flow according to the determined power offset parameterconfiguration.

The state determining unit 702 in the embodiment of the presentinvention may include:

a first state determining module, configured to determine a throughputrate state of the terminal according to the data throughput rate and acorresponding throughput rate threshold; wherein the throughput ratestate comprises at least one of a first throughput rate state and asecond throughput rate state, where the first throughput rate stateindicates that the data throughput rate is greater than or equal to afirst throughput rate threshold, the second throughput rate stateindicates that the data throughput rate is smaller than or equal to asecond throughput rate threshold, and the first throughput ratethreshold is greater than or equal to the second throughput ratethreshold; and/or

a second state determining module, configured to determine a user countstate or an uplink load state according to the cell resource usage stateand a corresponding threshold; wherein the user count state comprises atleast one of a first user count state and a second user count state,where the first user count state indicates that a user count is greaterthan or equal to a first user count threshold, the second user countstate indicates that a user count is smaller than or equal to a seconduser count threshold, and the first user count threshold is greater thanor equal to the second user count threshold; and the uplink load stateincludes at least one of the first uplink load state and the seconduplink load state, where the first uplink load state indicates thatuplink load is greater than or equal to a first uplink load threshold,the second uplink load state indicates that the uplink load is smallerthan or equal to a second uplink load threshold, and the first uplinkload threshold is greater than or equal to the second uplink loadthreshold.

The configuration determining unit 703 in the embodiment of the presentinvention may include:

a first configuration determining module, configured to determine thepower offset parameter configuration as low-speed parameterconfiguration if the data throughput rate of the terminal is in thefirst throughput rate state, where the low-speed parameter configurationis power parameter configuration with a lower data transmission rate, agreater search path and a higher channel estimation precision; or,configured to determine the power offset parameter configuration ashigh-speed parameter configuration if the data throughput rate of theterminal is in the second throughput rate state, where the high-speedparameter configuration is power parameter configuration with a higherdata transmission rate, a smaller search path and a lower channelestimation precision;

and/or, a second configuration determining module, configured todetermine the power offset parameter configuration as low-speedparameter configuration if a cell resource of a serving cell or at leastone cell in active set cells of the terminal is in the first user countstate or the first uplink load state; or, determine the power offsetparameter configuration as high-speed parameter configuration if a cellresource of a serving cell of the terminal is in the second user countstate or the second uplink load state;

and/or, a third configuration determining module, configured todetermine the power offset parameter configuration as low-speedparameter configuration if the throughput rate of the terminal is in thesecond throughput rate state and a cell resource of a serving cell or atleast one cell in active set cells of the terminal is in the firstuplink load state.

A specific interactive process of each unit in the radio network controldevice in the embodiment of the present invention is as follows:

the resource obtaining unit 701 of the radio network control deviceobtains the cell resource usage state of the terminal on the datachannel (optionally, the data channel may be an E-DPDCH).

In practical application, the radio network control device in theembodiment of the present invention may be an RNC or an evolved NodeB,and is not limited here. Optionally, the cell resource usage state maybe user count, uplink load or data throughput rate of a serving cell ora cell in active set cells of the terminal. Specifically, the cellresource usage state is the user count or the uplink load of the cell ifthe terminal is in an initial access state (in other word, no data usageis generated); and the cell resource usage state is the user count, theuplink load or the data throughput rate if the terminal is in a datatransmission state (in other word, data usage is generated). If the cellresource usage state is the data throughput rate, the radio networkcontrol device may perform entity detection on the data usage of theterminal on the E-DPDCH by its own RLC and calculate the data throughputrate of the terminal on the data channel according to the data usage.

Optionally, the detecting unit 706 may detect whether the datathroughput rate of the terminal on the data channel is changed beforethe state determining unit 702 performs operations. Specifically, thedetecting unit 706 may in real time detect whether the data throughputrate of the current time period is changed when comparing the datathroughput rate with that of a previous time period; if the datathroughput rate is changed, the state determining unit 702 is triggeredand a process for adjusting the power offset parameter is continuouslyperformed; if the data throughput rate is not changed, a process forsetting the power offset parameter is stopped.

The state determining unit 702 determines the resource state of theterminal according to the cell resource usage state and the presetthreshold.

Specifically, the preset threshold is decided according to the obtainedcell resource usage state. If the cell resource usage state is the usercount of the cell, the preset threshold is a user count threshold; ifthe cell resource usage state is the uplink load of the cell, the presetthreshold is a uplink load threshold; and if the cell resource usagestate is the data throughput rate of the cell, the preset threshold is athroughput rate threshold. No matter to which types the cell resourceusage state and the preset threshold belong, the resource state includesat least one type and the at least one type of resource state iscorresponding to power offset parameter configuration of at least onelevel, respectively, so that the radio network control device selectspower offset parameter configuration adaptive to the current resourcestate of the cell to implement data transmission.

Optionally, the resource state may be shown as a throughput rate statein a scenario where data transmission has occurred; moreover, there isat least one throughput rate state. For example, one throughput ratethreshold (in other word, the preset threshold) may be set and twothroughput rate states may be set if impacts on the terminal caused byfrequently adjusting power offset parameter configuration are notconsidered. If it needs to prevent frequent adjustments on the poweroffset parameter configuration, two throughput rate thresholds may beset; that is, there are three throughput rate states; therefore, thedata throughput rate of the terminal on the data channel may have areciprocating buffer zone; that is, the current power offset parameterconfiguration may not be adjusted when the data throughput rate is in amiddle throughput rate state. Specifically, the throughput rate stateincludes a first throughput rate state, a second throughput rate stateand a third throughput rate state, where the data throughput rategreater than or equal to a first throughput rate threshold belongs tothe first throughput rate state; the data throughput rate between thefirst throughput rate threshold and a second throughput rate threshold(in other word, a threshold smaller than the first throughput ratethreshold and greater than the second throughput rate threshold) belongsto the third throughput rate state; the data throughput rate smallerthan or equal to the second throughput rate threshold belongs to thesecond throughput rate state; and the first throughput rate threshold isgreater than the second throughput rate threshold. In the embodiment ofthe present invention, each throughput rate state may be preset withcorresponding power offset parameter configuration. Optionally, morethroughput rate states may be preset for the terminal. That is,multi-level power offset parameter configuration may be set; so that thepower offset parameter configuration is more precise. However, on thecontrary, speed smoothness may be affected if more throughput ratestates are set; moreover, more air interface signalling reconfigurationsmay directly increase call drop risk of the terminal.

Optionally, the resource state of the terminal may be determined by theradio network control device according to the cell resource usage stateif the terminal is in a scenario of initial access. The cell resourceusage state may be uplink load or user count of a serving cell or a cellin active set cells of the terminal. Specifically,

the radio network control device may determine the user count state orthe uplink load state according to the cell resource usage state and acorresponding threshold. The user count state includes at least one ofthe first user count state and the second user count state. The firstuser count state indicates that the user count is greater than or equalto the first user count threshold. The second user count state indicatesthat the user count is less or equal to the second user count threshold.The first user count threshold is greater than or equal to the seconduser count threshold.

The uplink load state includes at least one of the first uplink loadstate and the second uplink load state. The first uplink load stateindicates that the uplink load is greater than or equal to the firstuplink load threshold. The second uplink load state indicates that theuplink load is less or equal to the second uplink load threshold. Thefirst uplink load threshold is greater than or equal to the seconduplink load threshold.

After determining the resource state of the terminal, the configurationdetermining unit 703 determines the power offset parameter configurationcorresponding to the resource state according to the determined resourcestate.

Specifically, the configuration determining unit 703 determines thepower offset parameter configuration corresponding to the throughputrate state according to the determination result of the throughput ratestate in a scenario that data transmission has occurred. In theembodiment of the present invention, each throughput state is presetwith corresponding power offset parameter configuration, where the poweroffset parameter configuration may include specific parameter contentand relevant configuration (for example, the E-TFCI and the referencepower offset), or may include a policy of a set of configuration (forexample, keeping the current parameter unchanged). Like the firstthroughput rate state, the values of the data throughput rate in thefirst throughput rate state are all higher throughput rate. If the datathroughput rate of the terminal on the data channel is in the firstthroughput rate state, configuration capable of obtaining lower poweroffset parameter (the power offset is in inverse proportion to theDPCCH) may be configured for the terminal, so that the terminal mayobtain higher multi-path search and channel estimation precision, andtherefore obtaining optimal uplink high-speed data transmissionperformance.

Optionally, three throughput rate states and power offset parameterconfiguration at two levels (high-speed parameter configuration andlow-speed parameter configuration) may be set in the embodiment of thepresent invention in view of impacts on the transmission speed of theterminal, where the three throughput rate states are the firstthroughput rate state, the second throughput rate state and the thirdthroughput rate state, respectively; where the data throughput rategreater than or equal to the first throughput rate threshold is in thefirst throughput rate state; the data throughput rate between the firstthroughput rate threshold and the second throughput rate threshold (thatis, a threshold smaller than the first throughput rate threshold andgreater than the second throughput rate threshold) is in the thirdthroughput rate state; and the data throughput rate smaller than orequal to the second throughput rate threshold is in the secondthroughput rate state.

In the embodiment of the present invention, the uplink load state may beintegrally considered when determining the power offset parameterconfiguration. If the uplink load of the terminal is restricted (inother word, the terminal is in the first uplink load state), it is notpossible for the terminal to increase speed in a longer subsequent timeperiod; however, it is reasonable to adjust the power offset parameterconfiguration of the terminal as low-speed parameter configuration atthis moment. If the uplink load of the terminal is not restricted (inother word, the terminal is not in the first uplink load state), thecorresponding power offset parameter configuration may not be set aslow-speed parameter configuration even if the terminal is in the firstthroughput rate state.

Specifically, the power offset parameter configuration of the terminalmay be adjusted to make it be low-speed parameter configuration if thedata throughput rate is in the first throughput rate state and the cellresource of the serving cell or the at least one cell in the active setcells of the terminal is in the first upload state. Specifically, theterminal may be configured with configuration capable of obtaining alower power offset of the E-DPDCH relative to the DPCCH, or a lower HARQPO parameter for each MAC-d flow to reduce unnecessary uplink DPCCHpower load to the greatest extent in case of meeting multi-path searchand channel estimation precision needed by low-speed data transmission,so that more uplink load is used for transmitting terminal data, andtherefore obtaining optimal uplink low-speed data transmissionperformance. The current power offset parameter configuration is keptunchanged if the data throughput rate is in the first throughput ratestate and the cell resource of the serving cell or the at least one cellin the active set cells of the terminal is in a non-first uplink loadstate, or the data throughput rate is in the third throughput ratestate. The power offset parameter configuration of the terminal isadjusted to make it be high-speed parameter configuration if the datathroughput rate is in the second throughput rate state. Specifically,the terminal may be configured with configuration capable of obtaining ahigher power offset of the E-DPDCH relative to the DPCCH, or higher HARQPO parameter for each MAC-d flow so as to obtain higher multi-pathsearch and channel estimation precision, and therefore obtaining optimaluplink high-speed data transmission performance.

Optionally, the configuration determining unit 703 determines the poweroffset parameter configuration corresponding to the user count stateaccording to the determination result of the user count state if theterminal is in an initial access scenario; the radio network controldevice determines the power offset parameter configuration correspondingto the terminal as low-speed parameter configuration if the terminal isin the first user state (in other word the user count accessed is more);and the radio network control device determines the power offsetparameter configuration corresponding to the terminal as high-speedparameter configuration if the terminal is in the second user state (inother word, the user count accessed is less).

Optionally, if the resource state of the terminal is determinedaccording to the uplink load, the power offset parameter configurationis determined as low-speed parameter configuration if the cell resourceof the serving cell or the at least one cell in the active set cells ofthe terminal is in the first uplink load state. Or, the power offsetparameter configuration is determined as high-speed parameterconfiguration if the cell resource of the serving cell of the terminalis the second uplink load state.

After determining the power offset parameter configuration correspondingto the terminal, the configuration sending unit 704 sends the poweroffset parameter configuration to the terminal, so that the terminal mayset the power offset parameter according to the power offset parameterconfiguration, thereby implementing data transmission according to thepower offset parameter.

The terminal configured to dynamically adjust the power offset parameterin the embodiment of the present invention is illustrated below. For alogical structure of the terminal, reference may be made to FIG. 8. Aterminal according to one embodiment of the present invention includes:

a configuration receiving unit 801, configured to receive power offsetparameter configuration sent by a radio network control device, wherethe power offset parameter configuration is determined by the radionetwork control device according to cell resource usage state of theterminal on a data channel, and a corresponding threshold; and

a setting unit 802, configured to set the power offset parameter of theterminal according to the power offset parameter configuration.Optionally, the setting unit 802 may include:

a first setting module, configured to set a reference E-TFCI and areference power offset according to the determined power offsetparameter configuration;

and/or, a second setting module, configured to set an HARQ PO for eachMAC-d flow according to the determined power offset parameterconfiguration.

Specific performing processes of each unit in the terminal of theembodiment of the present invention are as follows:

the configuration receiving unit 801 of the terminal receives the poweroffset parameter configuration sent by the radio network control device,where the power offset parameter configuration is determined by theradio network control device according to data throughput rate and/orcell resource usage state of the terminal, and a correspondingthreshold. Optionally, the cell resource usage state includes uplinkload or user count of at least one cell in serving cells of theterminal, and/or, the uplink load or user count of at least one cell inactive set cells of the terminal.

Specifically, after determining the power offset parameter configurationof the terminal, the radio network control device needs to send thepower offset parameter configuration to the terminal, so that theterminal may set the power offset parameter according to the poweroffset parameter configuration, thereby implementing data transmissionaccording to the power offset parameter. Specific content of the poweroffset parameter configuration may include: such parameter as areference E-TFCI and a reference power offset, and/or an HARQ PO foreach MAC-d flow, and the like. Moreover, the power offset parameterconfiguration may include specific parameter content and relevantconfiguration (for example, the E-TFCI and the reference power offset),and may be further a policy of a set of configuration (for example,keeping the current parameter unchanged). A specific realization mode ofthe power offset parameter configuration may be decided according topractical situations and is not limited here.

After obtaining the power offset parameter configuration, the settingunit 802 sets the power offset parameter of the terminal according tothe power offset parameter configuration. Specifically, the method forsetting the power offset parameter needs to be determined according tothe content of the power offset parameter configuration. For example:

if the power offset parameter configuration is the policy of a set ofconfiguration, for example, keeping the current parameter unchanged, theterminal does not need to modify the current power offset parameter; ifthe power offset parameter configuration is the specific parametercontent and relevant configuration, the terminal needs to set accordingto the parameter content in the power offset parameter configuration,specifically:

(1)configuration of a reference E-TFCI and a reference power offset maybe unchanged, and configuration of an HARQ PO may be adjusted; forexample, the HARQ PO is configured as 5 dB in low-speed parameterconfiguration; and the HARQ PO is configured as 0 dB in high-speedparameter configuration;

(2) Or, the HARQ PO may be unchanged, and the configuration of thereference E-TFCI and the reference PO may be adjusted; for example, theHARQ PO is always set as 0 dB; however, in the high-speed parameterconfiguration, the reference E-TFCI and the reference PO are:

Reference E-TFCI Reference PO 1 11 3 13 . . . . . .

The configuration of the E-TFCI and the reference PO may beconfiguration with only one group of numbers such as “1” and “11”, andmay be further configuration with a plurality of groups of numbers whichare represented by ellipsis here and is not described again.

However, the configuration of the E-TFCI and the reference PO in thelow-speed parameter configuration is:

Reference E-TFCI Reference PO 1 16 3 18 . . . . . .

(3) All the configuration of the reference E-TFCI, the reference PO andthe HARQ PO may be adjusted. Assume that initial configuration of (1)and (2) is high-speed parameter configuration, then the reference E-TFCIand the reference PO in the low-speed parameter configuration are:

Reference E-TFCI Reference PO 1 16 3 18 . . . . . .

Moreover, HARQ PO=3 dB.

In the several embodiments provided in the present application, itshould be understood that the disclosed apparatuses and methods may beimplemented in other manners. For example, the described apparatusembodiment is merely exemplary. For example, the unit division is merelylogical function division and may be other division in actualimplementation. For example, a plurality of units or components may becombined or integrated into another system, or some features may beignored or not performed. In addition, the displayed or discussed mutualcouplings or direct couplings or communication connections may beimplemented through some interfaces. The indirect couplings orcommunication connections between the apparatuses or units may beimplemented in electronic, mechanical or other forms.

The units described as separate parts may or may not be physicallyseparate, and parts displayed as units may or may not be physical units,may be located in one position, or may be distributed on a plurality ofnetwork units. A part or all of the units may be selected according toan actual need to achieve the objectives of the solutions of theembodiments.

In addition, functional units in the embodiments of the presentinvention may be integrated into one processing unit, or each of theunits may exist alone physically, or two or more units are integratedinto one unit. The integrated unit may be implemented in the form ofhardware, or may be implemented in the form of a software functionalunit.

When the integrated unit is implemented in the form of a softwarefunctional unit and sold or used as an independent product, theintegrated unit may be stored in a computer-readable storage medium.Based on such an understanding, the technical solutions of the presentinvention essentially, or the part contributing to the prior art, or allor a part of the technical solutions may be implemented in the form of asoftware product. The computer software product is stored in a storagemedium and includes several instructions for instructing a computerdevice (which may be a personal computer, a server, or a network device)to perform all or a part of steps of the methods described in theembodiments of the present invention. The storage medium includes: anymedium that may store program code, such as a USB flash disk, aremovable hard disk, a read-only memory (ROM, Read-Only Memory), arandom access memory (RAM, Random Access Memory), a magnetic disk, or anoptical disk.

The foregoing descriptions are merely specific embodiments of thepresent invention, but are not intended to limit the protection scope ofthe present invention. Any variation or replacement readily figured outby persons skilled in the art within the technical scope disclosed inthe present invention shall fall within the protection scope of thepresent invention. Therefore, the protection scope of the presentinvention shall be subject to the protection scope of the claims.

What is claimed is:
 1. A method for determining a power offsetparameter, comprising: obtaining user count of a serving cell of aterminal; determining a user count state according to the user count anda corresponding threshold, wherein the user count state comprises atleast one of a first user count state and a second user count state,wherein the first user count state indicates that a user count isgreater than or equal to a first user count threshold, the second usercount state indicates that the user count is smaller than or equal to asecond user count threshold, and the first user count threshold isgreater than or equal to the second user count threshold; when the usercount state is in the first user count state, determining a power offsetparameter configuration as low-speed parameter configuration; andsending the power offset parameter configuration to the terminal, toenable the terminal to determine the power offset parameter according tothe power offset parameter configuration.
 2. The method according toclaim 1, wherein the low-speed parameter configuration is powerparameter configuration with a data transmission rate lower than a datatransmission rate threshold, a search path whose number is greater thana search path threshold and channel estimation precision greater than achannel estimation precision threshold.
 3. The method according to claim1, wherein the method further comprises: when the user count state is inthe second user count state, determining the power offset parameterconfiguration as high-speed parameter configuration.
 4. The methodaccording to claim 3, wherein the high-speed parameter configuration ispower parameter configuration with a data transmission rate higher thana data transmission rate threshold, a search path whose number issmaller than a search path threshold and channel estimation precisiongreater than a channel estimation precision threshold.
 5. The methodaccording to claim 1, wherein the power offset parameter configurationcomprises: a reference E-DCH transport format combination indicator(E-TFCI) and a reference power offset, and/or a hybrid automatic repeatrequest power offset (HARQ PO) of each media access control (MAC)-dflow.
 6. A radio network control device, comprising a processor, and anon-transitory processor-readable medium having processor-executableinstructions stored thereon, which when executed causes the processorto: obtain user count of a serving cell of a terminal; determine a usercount state according to the user count and a corresponding threshold,wherein the user count state comprises at least one of a first usercount state and a second user count state, wherein the first user countstate indicates that a user count is greater than or equal to a firstuser count threshold, the second user count state indicates that theuser count is smaller than or equal to a second user count threshold,and the first user count threshold is greater than or equal to thesecond user count threshold; when the user count state is in the firstuser count state, determine a power offset parameter configuration aslow-speed parameter configuration; and send the power offset parameterconfiguration to the terminal, to enable the terminal to determine thepower offset parameter according to the power offset parameterconfiguration.
 7. The radio network control device according to claim 6,wherein the low-speed parameter configuration is power parameterconfiguration with a data transmission rate lower than a datatransmission rate threshold, a search path whose number is greater thana search path threshold and channel estimation precision greater than achannel estimation precision threshold.
 8. The radio network controldevice according to claim 6, wherein the processor is further configuredto: when the user count state is in the second user count state,determine the power offset parameter configuration as high-speedparameter configuration.
 9. The radio network control device accordingto claim 8, wherein the high-speed parameter configuration is powerparameter configuration with a data transmission rate higher than a datatransmission rate threshold, a search path whose number is smaller thana search path threshold and channel estimation precision greater than achannel estimation precision threshold.
 10. The radio network controldevice according to claim 6, wherein the power offset parameterconfiguration comprises: a reference E-DCH transport format combinationindicator (E-TFCI) and a reference power offset, and/or a hybridautomatic repeat request power offset (HARQ PO) of each media accesscontrol (MAC)-d flow.
 11. A system, comprising a radio network controldevice, and a terminal, wherein: the radio network control device isconfigured to obtain user count of a serving cell of the terminal,determine a user count state according to the user count and acorresponding threshold, wherein the user count state comprises at leastone of a first user count state and a second user count state, whereinthe first user count state indicates that a user count is greater thanor equal to a first user count threshold, the second user count stateindicates that the user count is smaller than or equal to a second usercount threshold, and the first user count threshold is greater than orequal to the second user count threshold; when the user count state isin the first user count state, determine a power offset parameterconfiguration as low-speed parameter configuration; and send the poweroffset parameter configuration to the terminal; and, the terminal isconfigured to receive power offset parameter configuration sent by aradio network control device, and set a power offset parameter of theterminal according to the power offset parameter configuration.
 12. Thesystem according to claim 11, wherein the low-speed parameterconfiguration is power parameter configuration with a data transmissionrate lower than a data transmission rate threshold, a search path whosenumber is greater than a search path threshold and channel estimationprecision greater than a channel estimation precision threshold.
 13. Thesystem according to claim 11, wherein the radio network control deviceis further configured to: when the user count state is in the seconduser count state, determine the power offset parameter configuration ashigh-speed parameter configuration.
 14. The system according to claim13, wherein the high-speed parameter configuration is power parameterconfiguration with a data transmission rate higher than a datatransmission rate threshold, a search path whose number is smaller thana search path threshold and channel estimation precision greater than achannel estimation precision threshold.
 15. The system according toclaim 11, wherein the power offset parameter configuration comprises: areference E-DCH transport format combination indicator (E-TFCI) and areference power offset, and/or a hybrid automatic repeat request poweroffset (HARQ PO) of each media access control (MAC)-d flow.